QMI Agency

When it came to saying goodbye, former Tonight Show host Conan O’Brien wasn’t going to let Jay Leno leave without taking one last dig.

The comedian, who many say had his job as Tonight host stolen from him in 2010 after less than a year in the big chair, told his audience Thursday night: “The Olympics start airing tonight on NBC. It's very cool. That's right, NBC has the Olympics. It's a big deal. NBC will finally get to show somebody who is OK with passing the torch.”

The audience erupted and O'Brien started chuckling. "I allowed myself one," he said. "But it was a good one."

David Letterman didn’t have a mean word to say. “Congratulation,” he said. “I’ll tell you something — if I was Jay Leno and I was retiring, you know what I would do? I would go out and buy myself a car.”

Jimmy Kimmel, who famously tore Leno apart on the Tonight Show in 2010, tweeted: “Issues aside, 20 years at #1 is a remarkable achievement. Congratulations and best wishes to @jayleno on an incredible run.”

Issues aside, 20 years at #1 is a remarkable achievement. Congratulations and best wishes to @jayleno on an incredible run